Features:

• Track your activity levels, sleep patterns, and more with the black Fitbit Alta Activity Tracker in size small. This sleek band uses an array of sensors to keep track of how many steps you take, how far you walk, how many floors you climb, the number of calories you burn, and the time you spend active. It connects to your smartphone via Bluetooth and syncs its data wirelessly while providing you with notifications, workout assistance, and more on its OLED tap display.
• Alta syncs automatically and wirelessly to computers and 200+ leading iOS, Android and Windows devices using Bluetooth 4.0 wireless technology. Syncing to computers requires Internet connection and USB port. Syncing to mobile devices requires Bluetooth and Internet connection. Syncing range: 20 feet
• Water Resistance: Alta is sweat, rain, splash proof. You can wear Alta in the shower, but we recommend rinsing and drying it afterwards because it's best for your skin if the band stays clean and dry. Battery life: lasts up to 5 days. Radio transceiver: Bluetooth 4.0
• We recommend charging your device every few days to ensure you are always tracking. Charge time: One to two hours
• Syncs with Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3 gen. and later, and leading Android and Windows devices

Product Description
Motivation is your best accessory with Fitbit Alta--a customizable fitness tracker designed to fit your personal style. Stay motivated by tracking all-day activity like steps, distance, calories burned and active minutes, and get credit for your workouts with SmartTrack automatic exercise recognition. At night, track your sleep and set a silent alarm to wake better and get your best rest. No matter where you're headed, the easy-to-read OLED screen keeps your goals in focus with stats, time, and call or text notifications on display. And with accessory wristbands in metal, leather and sport, help you find the right style for every occasion. Wear fitness your way with Fitbit Alta.

PurePulse heart rateAuto sleep tracking & sleep stagesCall, text & calendar alertsReminders to moveCardio Fitness LevelEssential featuresSteps, Calories & Distance

Fitbit Alta HR (US Version) (small - black). The minimum and maximum circumference range between 170-206 mm Get the power of continuous heart rate in Fitbit's slimmest design yet-all day, during workouts and beyond With heart rate, you can better measure calorie burn, and use zones (Fat Burn, Cardio, and Peak) to find the...